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From [log in to unmask] Sat Apr 27 15: |
14:31 1996 |
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Speaking of a rigid nature. (Not so flexible - Sorry Joe)
RF and Microwave boards are laced with ground
vias/straps/bussing...etc. (Capacitance related) It's not uncommon for
these boards to have edge plating requirements for EMC/EMI-RFI
Shielding. These parts do in deed have a lot of routed thru holes.
These however, are anchored with internal ground planes and wont budge
when cut into to. A signal via on the other hand could be an issue.
Especially if the hole and pad size (Keep non-functionals out of this
gang. HeHeHe :))are extremely small. (ie. <.022pad/.010hl) I haven't
seen much of this type of design on PCBs (except for PC cards and
CSP). It's never been a yield issue. I would think that for high speed
boards you could encounter some undesirable electrical issues.
I hope others have some more input also.
Groovy
______________________________ Reply Separator _________________________________
Subject: Re: Hole to board edge
Author: [log in to unmask] at SMTPLINK-HADCO
Date: 10/27/95 3:08 AM
There have been a number of products built over the years where the plated
through holes have been routed in half. They seem to have served well the
needs of the customer. I don't know if this serves as an adequate gage for
you but it places a stake in the ground for you to reference.
Cheers
J. Fjelstad
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